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3.73 is all you are going to want 4.10 are a strictly drag gear, you will burn all the tread of your tires with those but 3.73 is a good all around gear :bullitt:
 

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<TABLE BORDER=0 ALIGN=CENTER WIDTH=85%><TR><TD><font size=-1>Quote:</font><HR></TD></TR><TR><TD><FONT SIZE=-1><BLOCKQUOTE>
On 2001-10-08 00:15, Black Sunshine #161 wrote:
4.10s rule

rt. .554
60ft 1.11
1/8 7.90
1/4 12.25
trap 109mph

</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR></TD></TR></TABLE>Woa, whats crusin RPM's in that there Bullitt? 3,900 ? Did you go with a colder plug for that fuel and 14 timing? 4.10s in a Cobra are the thing, big redline on that mill, You must be shifting like crazy to keep from bouncing off the limiter. :smile:
 

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Someone posted RPM's @ 70MPH for the two gears . The 3:73's were 2300 and the 4:10's were 2500. In my opinion thats an insignificant difference. I'm goin with the 4:10's. Faster E.T. VRS. Very slight gas mileage difference. I want to feel that pull on excel.
 

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my bad.....60 ft correction.....1.91

ran the stock plugs for it. my cruisin rpm at 80mph is 2900. its not too bad on the highway, but i am mostly building it for drag racing. you do have to shift really quick to keep it off the rev limiter. do the burnouts in 2nd. on ET's i launch in 1st and slam 2nd pretty quick. with DR's on the track i launch in 2nd. no point to 1st gear with that small of tire. around town is still good drivin with them. itll get up in the power band quick. Brian- #66 got to drive it the other night at our get-together in Houston. He seemed to like the pretty well. I still have other susp. mods to do cause the biggest thing you will notice when you go to 4.10s................no traction. If you just dirve your car and dont race it i would go with the 373 or 355. But if racin is your drug, 4.10's all the way.
 

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Discussion Starter · #11 ·
Thanks for all the info I'm thinkin 3:73 cuz I wanna feel the pull but Shes a street car. now to stay with stock Track-Lock or to upgrade to a stronger diff Like the 8.8 Detroit Locker. to much to get to little money ;P
 

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Black Sunshine is correct. I drove Jerry's car Sat night. The 410's really get the car in the power band and moving quickly. For the drag racer and short drive user, they are great. If you do much highway, or a road racer like me, 3.73's are going to be the ticket.

Jerry is doing amazing thinfs with #161 and the 12 second pass is real.

Brian
 

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80 mph with 3.73 s/b 2700 rpm
80 mph with 3.27 is 2400 rpm
See 4.10 gear reading above.

I agree with the group, 3.73 for street/road course/highway, 4.10 for pink slips. Now, if we had the Cobra motor, I might would consider 4.10 for road course work (higher redline, more high end power).
 

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hey,

Where are you Houston guys getting together at? Is is at the Race park or some open highway. I would like to come out and watch sometime. I am new to mod's and drags in general. I get off on speed though!!!
 
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